Affect: To produce a material influence
upon or alteration in, or to act upon a person so as to produce a response. “As Detective Inspector, Gregory Lestrade affects many people and outcomes.“
Effect: Something that inevitably follows a cause or agent. A distinctive impression, or the creation of such. “Gregory Lestrade’s air of command and competence has great effect upon Mycroft Holmes.”
Mnemonic device for the above: The affect is the action, while the effect is the result.
Effect #2: To cause to come into being, such as by putting something into operation, or bringing something about, often by overcoming obstacles. “Mycroft Holmes effects change…globally.”
Green Violin Bow 